China denies German media reports of an assessment carried out by spying agency BND in 2020 supporting the theory.
7dOpinion
Why Western intel agencies help Putin and Xi keep their darkest secrets.
From animal hosts to laboratory leaks, the debate over the origin of the coronavirus pandemic is not yet settled – and may never be.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback